M. arenaria may refer to: Meloidogyne arenaria, a plant pathogenic nematode species Mya arenaria, the soft-shell clam, steamer, softshell, longneck, piss clams or Ipswich clam, an edible saltwater clam species Synonyms Medicago arenaria, a synonym for Medicago littoralis, a plant species found primarily in the Mediterranean basin See also Arenaria (disambiguation)